Gas range



May 19, 1931. e. A. ROBINSON GAS RANGE Filed July 24. 1929 3 Sheets-Sheet l INVENTOR.

EDT].

ATTORNEYS.

May 19, 1931. e. A. ROBINSON GAS RANGE Filed July 24. 1929 3 Sheets-Sheet 2 INVENTOR. A? 51.3 A.Rubins cm.

1 IIIIIIIII IIIIIIIIIIIIIIIIIIIIIIIIIII ATTORNEYS.

Patented May 19, 1931 v 1 33%3 UNITED] STATES PATENT OFFECE I,

" GUY anonrivson, or CINCINNATI, OHIO ens RANGE: Application filed July 24, 1929. f SeriaI No. 380,622. 7 This invention relates to improvements in lowered to closely space the grids with respect means for regulating the heating efficiency of to the burner.

gas ranges. Figure 4 is a sectional view taken substan- It is well known to users of natural gas tially on the line 4- 101? Figure 1.

that. during periods of large consumption the Figure5 is a horizontal sectional iew, I

heating efficiency of gas ranges is veryoften showing in dotted lines the plan view of a inadequate. It is caused by a diminution of range with a modified type of, top wall and pressure by reason. of large consumption, so grid elevating and lowering means.

that the tip of the flame is too farbelow the Figures 6 and 7 are sectional views taken i there are considerable fluctuations in gas the, section of Figure 6 showing thetop wall pressure in various parts of the country. oftherange of Figure5 spaced with its grids Furthermore, the conventional gas range, a considerable distance from the burners; utilizing manufacturedgas, and even ordithe sectional view of Figure 7 showing the nary natural gas, is not suitable for use with top wall and grid closer to the burner. 3'6

liquefied natural gas, because the utensil sup- Figure 8is a sectional view taken on the porting grid of the conventional range is too line 8-8 of Figure 5., f 1 far spaced from the burner; 'Forthese rea- In the drawings, wherein for the purpose sons, the present invention includes a gas of illustration are shown preferred andmodi-v g range comprising an upstandingframe' wall fiedforms of the invention, the letter A may structure, upon which the top wall is adjustgenerally designate the preferred form of ably mounted by improved means; the top invention, shown in Figures 1 to l'inclusive, wall structure supporting a plurality'of grids and B may generally designate the modified which are elevated and lowered with the top form of invention shown in Figures 5 to 8 wall frame structure in a variable relation inclusive. p a

with respectto stationary burners, so that the Inboth' forms of invention it is preferred proper spacing of burners with respect to to provide a range or stove including a main the plurality of grids may be obtained, best frame comprising upstanding opposed side suited'to the type and character of gas being walls 11 and 12 connected by transverse walls '36 used. I Y or braces 13 and supported by legsor any Other: objects and'advantages ofthis inother approved structure. The walls 11' and vention will be apparent duringthe course 12 and brace means 13 may support a plu-.

of the following detailed description. rali y f bu 1 16 I l 7, in any In the drawings, wherein similar reference approved conventional manner; the same characters designate corresponding parts being detachable upon the stationary frame so throughout the several views, of the range, and respectively having con- Figure 1 is a fragmentary'plan view, part duits leading to theirgas regulating valve ly in section, showing a gasrange structure, structures 19, 20, 21 and 22. suitable dr p with the improved top wall and gridelevatpan 23 may be removablycarr ed by the walls 40 ing and lowering mechanism. v V 11 and 12 and the means 13, below the' sta- Figures 2 and 3 are cross's'ectional views tionary burners 14- to 17 inclusive, for well taken substantially on the line X-X of Figknown reasons. v p I ure 1; Figure 2-showing'the top plate elevated Furthermore, in both forms of invention, and spaced a considerable distance from the the ranges include a top Wall structure 0,

45 burners, and Figure 3 showing the top plate which ncludes the preferably solid marginal iii.

" utensil being heated. I It is also known that substantially on the line'Y Y of Figure 5; 55

portion 16, having the laterally extending flange portions 17 and being provided with openings therein above each of the burners 14 to 17 inclusive, for respectively supporting detachable grids 24 thereover. The grids 24 are polygonal in form, although they may be of any other shape, and of course, the top wall C is suitably provided with cross beams 25, of well known construction connected with the marginal portions 16 of the top wall, and formed to detachably receive the grids 24 thereon. It is of course understood that a detachable grid is provided for each burner, so that in the example shown there are four burners and four individual grids therefor.

Referring to the form of invention A, the entire top wall structure G including the grids 24 thereof is bodily movable into a desired adjustable spaced relation with respect to the burners. The arrangement is shown in Figures 1, 2, 3 and 4, and includes a pair of rotatable shafts and 31, secured by end and intermediate brackets 32 in a horizontal rotatable relation at the insides of the opposite range stationary frame walls 11 and 12 respectively, as shown in Figure 1 of the drawings. The shafts 30 and 31 are provided with end pinions and 36 respec tively, housed within the end brackets 32; the latter being hollow and over-roofing the pinions 35 and 36 as a protection therefor, as shown. in Figures 2 and 3 of the drawings. These end pinions 35 and 36 of the shafts 30 and 31 respectively have the teeth thereof in meshing engagement with racks 37 and 38 respectively. The racks 37 and 38 are dove-tailed for vertical sliding in the brackets 32, and their upper ends are detachablyconnected as shown at 40 in Figures 2 and 3 of the drawings, to the corners of the top wall C, preferably at a marginally solid portion 16 of the top wall C. The racks 37 are straight, and connected in right an led depending relation from the top wall 6, and. it is to be noted that there is a rack at each corner of the top wall C meshing with a pinion 35 or 36, as the case may be. Upon counter-rotation of the shafts 30 and 31 it is apparent that the top wall C and the grids therewith will be elevated and lowered. This rotation of the shafts 30 and 31 .is accomplished by providing a transverse operating shaft 45, shown in Figures 1 and 4 of the drawings, the ends of which-bear in the intermediate brackets 32 of the shafts 30 and 31, the right end of the shaft 45 extend ing through the wall 12 of the stationary frame of the range and having a lever or crank wheel 47 secured therewith to permit manual rotation of the shaft 45. The shaft 45 haskeyed therewith worms 49 and 50, housed in the intermediate shaft housings 32 and respectively meshing with worm gears 51 and 52 keyed on the intermediate portions of the shafts 30 and 31 respectively. The worms 49 and 50 are pitched in opposite directions, as are also the worm gears 51 and 52, so that upon rotation of the shaft 45 the shafts 30 and 31 will be rotated in opposite directions, to either feed all of the toothed racks 37 and 38 upwardly or downwardly, to accomplish the elevation or lowering of the entire top wall structure of the range with respect to the plurality of burners which cannot be elevated or lowered.

It is to be particularly noted. that the racks 37 and 38 are so dove-tailed in their respective brackets 32 provided therefor, that they are held against tipping. The housings 32 have the tops thereof slotted merely to permit the racks 37 and 38 to slide therethrough. Otherwise the said housings of the brackets 32 cover the gear details therein against collection of foreign materials.

, In the form of invention B, a pair of shafts 60 and 61 are rotatably supported at the inner sides of the walls 11 and 12 of the stationary structure of the range. Thus, the shaft 60 is supported at its ends by brackets 63 secured to the wall 11 at the inside thereof, as shown in Figures Sand 6; an intermediate bracket 64 also being provided on the wall for said shaft. Similarly the shaft 61 is rotatably supported at its ends in bearing brackets 66 secured to the inside surface of the wall 12 and extending normal thereto. Furthermore, an intermediate bracket 67 is provided on the wall 12 for the shaft 61.

At the endsthereof the shafts 60 and 61 are each provided with radially extending arms 70, having pivotal connection at their free ends with links 72 which extend upwardly and are pivotally connected at 74 with brackets or bearings 7 5 secured to the undersurface of that portion of the top wall structure 0 which is laterally of the grids, as shown at 16 With this connection of the shafts 60 and 61 at their ends with the wall C it is ap parent that upon rotation of the shafts 60 and 61,'in the proper direction, the top wall C will be elevated and lowered with respect to the burners to accomplish the purposes of the invention above outlined. It is to be particularly noted that the end connection of linkage upon the shafts 60 and 61 insures that the top wall structure C will find an elevating and lowering connection at each corner thereof.

For the purpose of simultaneously moving the shafts 60 and 61 in the same direction, I prefer to provide an operating rod 80, extending transversely through the stove range below the burners thereof, which at its remote end is pivoted at 81 with an arm 82 keyed on the shaft 60. The arm 82 is radial above mentioned. The operating rod 80 at its opposite end extends transversely through an opening provided in the wall 12 of the stove, as shown at 85 in Figure 8 of the drawings. This opening 85 permits the rod 80 to be elevated and lowered slightly adj aeent the wall, so that any of a number of notches 87 provided along the lower edge of the rod may be notched in a detent flange 88 which is secured on the wall 12 at the opening 85, for the purpose of holding the rod 80 against accidental inward or outward movement, as would ordinarily cause an elevation or lowering of the top wall of the gas range. It is to be particularly noted that the operating rod 80 has an arm 89 pivoted therewith at 90; the arm 89 being radially of and rigid on the shaft 61 above mentioned. Since such an operating means necessitates that both the shafts 60 and 61 rotate in the same direction to enable the elevation and lowering of the top wall C, it is intended that the arms 70 of the shafts 60 and 61 lie parallel, or substantially parallel, and the connecting links 72 of both of said shafts are preferably also in parallelism.

From the position shown in Figure 6, upon moving the rod 80 inwardly upon disconnec tion of the notch 87 from the detent 88, it is to be noted that the arms 70 .will be moved downwardly, and through the link connections 72 the top wall C of the range will be lowered to place the grids closer to the burners. The position of burners andgrids, as shown in Figure 6, are in their maximum spaced relation, while the closest spaced relation'of the same is designated in Figures 7 and 8 of the drawings.

proposed to vary the'distance between burner and grid, so far as I am, aware,.no prior device shows an arrangement which enables elevation and lowering of the entire top wall of a range, together w th its grids, relatlve t0 burners.

Various changes in the shape, size, and'arrangement of parts may be made-to the forms of lnventlon herein shown and described,

without departing from the spirit of the invention or the scope of the: claims.

I claim: I

1. In a gas range the combination of a stationary lower frame portion including burners connected therewith, a top wall structure including grids for the respective burners, and means connectedwith the lower frame portion of the range for operatively elevat- 'ng and lowering the top wall and the grids therewith. v

2. In a gasrange the combination of a body frame having burners operatively associated therewith anda top wall removably associated therewith above the burners, grids carried by'the top wall for the respective burners, and means operatively mounted upon the body frame for elevating and lowering the entire top wall including the grids towards and away from theburners to place the grids at proper spaced distances with respect to the burners.

3. In a gas range a body frame having burners operatively associated therewith and, a top wall movably-associated with the'body' frame above the burners and including grids for each of -the burners, detachable from the top wall, and means for elevating and a lowering the top wall and the grids therewith for spacing the grids at desired distances with respect to the burners in relation to the fuel being used.

4:. In a gas range a body frame having a burner operatively associated therewith, a

top wall having a removable grid for support-.

ing utensils above the burner, and means for elevating and lowering the top wall with respect to the body frame to properly space the grids from each burner.

5. In a gas range a body frame including opposite walls with burner means therebes tween, a top wa-llincluding grid means for supportmg utenslls above the burner means,

6. In a gas range a body frame ing a. plurality of grids thereon, burner means operatively supported by the body frame, shafts rotatable upon said upstanding body andthe top wallfor elevating the latter 0r lowering it with respect tothe burner means. Villle I realize that it has heretofore been having upstanding walls, a stop wall structure hav- 7 In a gas range structure a body frame having upstanding walls, burners carried by said body frame, a top wall structureincluding a frame and grids individually supported said body frame, links operatively connecting said shafts eccentric thereto with the top wall, and means for simultaneously operating the shafts to elevate or lower the top wall.

having opposite walls, burners carried by said body frame, a top wall structure includ- 2 8; In a gas range structure, a body frame 7 ing a frame and grids individually supportj ed thereby for the respective burners, bell crank levers pivotally mounted upon said so and means supported'by said opposite walls I for operatively lowering and elevatingthe .top wall to properly space the grid. means. with respect to the burner means.

frame walls, and means connecting said shafts body Walls and between said body Walls, a rigid rod pivotally connecting said bell crank levers atsiniilar ends for simultaneous movement, means to adjustably hold said rod in predetermined positions and means movably andindividually connecting the other ends of said bell crank levers with said top Wall whereby upon movement of said connecting rod the top well together with its grids will be elevated or lowered 'With respect to said burners.

GUY A. ROBINSON. 

